<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Promise API</title>
</head>

<body>
    <script>
        let p = new Promise((resolve,reject) =>{
            // 同步调研
            // console.log(111);
            reject('error')
        });
        // console.log(222);

        // 执行catch方法
        p.catch(reason =>{
            console.log(reason);
        })
    </script>
</body>

</html>